.publicity{
    width: 100%;
    margin: 0 auto;
    padding-top: 10px;
}
.publicity .main{
    width: 86%;
    padding: 10px 4%;
    margin: 0 auto;
    border: 1px solid #cccccc;
    margin-bottom: 10px;
}
.publicity .main .text{
    line-height: 22px;
    height: 40px;
    overflow: hidden;
    width: 100%;
    border: none;
    outline: none;
    resize: none;
    font-size: 14px;
    -webkit-user-select: text;
}
.publicity .main .btn{
    font-weight: 600;
    color: royalblue;
}
.main_image{
    padding: 10px 4%;
    width: 92%;
}
.main_image ul{
    width: 100%;
}
.main_image li{
    width: 31%;
    margin-right: 3%;
    float: left;
    background: #ccc;
    margin-bottom: 10px;
}
.main_image li img{
    width: 100%;
    height: 100%;
}
.main_image li:nth-child(3n){
    margin-right: 0;
}
.download p{
    display: inline-block;
    float: left;
    font-size: 14px;
    margin-left: 10px;
}
.download button{
    outline: none;
    border: 1px solid #ccc;
    border-radius: 5px;
    background: #fff;
    float: right;
    margin-right: 10px;
    font-size: 14px;
}